1,326 prompts matching "What the formula gives when the discriminant is negative"
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Quiz: The semi-interquartile range
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Practice: The mean deviation from the mean
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Explain Back: The variance of an ungrouped set of data
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WAEC Prep: The standard deviation of grouped data using an assumed mean
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Show All Working: The effect on the standard deviation of adding a constant to every value
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Quiz: The principle of moments for a body in equilibrium
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Explain Back: Finding the reaction at each support of a loaded beam
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Practice: The triangle of velocities for a boat crossing a river
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Explain Back: The course to steer so that a boat crosses straight over
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Spot My Mistake: An aeroplane in a cross-wind, and its resultant track
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WAEC Prep: The closest approach of two moving ships
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Show All Working: The time at which two bodies are nearest one another
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Quiz: The tension in the string joining two connected particles
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WAEC Prep: A car towing a trailer, and the force in the tow bar
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Show All Working: A lift, and the person standing in it
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Quiz: The acceleration of a body sliding down a smooth incline
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Practice: The frictional force on a body on a rough incline
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Explain Back: The angle of friction, and the coefficient of friction
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WAEC Prep: Limiting equilibrium, with a body on the point of sliding
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Show All Working: The angle at which a body just begins to slide
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